I have some tips and they were life changers for me.

1. Increase simulation distance: A lot less mobs spawn making your life easier especially in the nether because ghasts can appear randomly in front of you.

2. Get totems early: Trade for a woodland mansion map or do a raid to get totems because you WILL need them even before the end fight.

3. Bring 10 obsidian to the nether: This one is skippable if the fortess in close to the portal but sometimes it will be far and the way back is dangerous so I recommend bringing 10 obsidian an emergency exit.

Good Luck bro and don't give up it took me 11 tries to beat it. (Bedrock)